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Experimental and numerical research on the flow and heat transfer characteristics of TiO2-water nanofluids in a corrugated tube
- Source :
- International Journal of Heat and Mass Transfer. 115:1072-1084
- Publication Year :
- 2017
- Publisher :
- Elsevier BV, 2017.
-
Abstract
- Flow resistance and enhanced heat transfer characteristics of TiO2-water nanofluids in a stainless-steel corrugated tube and a circular tube are investigated by experimental and numerical methods respectively. The flow and heat transfer characteristics of TiO2-water nanofluids and deionized water in test tubes are compared in this paper. In addition, effects of Reynolds number (Re) and nanoparticle mass fraction (ω) on flow and heat transfer performances are discussed respectively, and Nusselt number (Nu) and resistance coefficient (f) are studied respectively. Finally, comprehensive performance of flow resistance and heat transfer enhancement is evaluated. It can be obtained that adding nanoparticle into deionized water doesn’t cause a large additional resistance loss in some degree, while the combination of corrugated tube and TiO2-water nanofluids shows an excellent heat transfer enhancement, which can enhance the heat transfer by 53.95% at maximum extent. In addition, the corrugated tube has a strong sustainability in enhancing heat transfer. The enhanced heat transfer rising part (6000 ≤ Re ≤ 10,000) has a large rising slope (about 7.90E−5), and the descending slope (about 7.16E−6) of enhanced heat transfer part (10,000 ≤ Re ≤ 12,000) is small.
- Subjects :
- Fluid Flow and Transfer Processes
Materials science
020209 energy
Mechanical Engineering
Heat transfer enhancement
Enhanced heat transfer
Thermodynamics
02 engineering and technology
Heat transfer coefficient
021001 nanoscience & nanotechnology
Condensed Matter Physics
Concentric tube heat exchanger
Nusselt number
Forced convection
Nanofluid
Heat transfer
0202 electrical engineering, electronic engineering, information engineering
Composite material
0210 nano-technology
Subjects
Details
- ISSN :
- 00179310
- Volume :
- 115
- Database :
- OpenAIRE
- Journal :
- International Journal of Heat and Mass Transfer
- Accession number :
- edsair.doi...........383169bfce62f236088f0188fbeb4cc4